I've used both a knock-off (clone makes me think of an engine) and a Comet. Both on the same mini bike. I have the knock-off installed and will probably use the Comet in a build I'll sell.
I'll sell you a used Comet for the price of a new knockoff (plus shipping).
But you can probably tell, the knock-off is fine.
(clone makes me think of an engine)
Maybe it's just the pics, but that looks like crappy stamped steel
Clone simply (& literally) means a copy of the original...